Well, with the versions up until 0.9.4 you would have gotten the last
bit of the file, the \score {} blocks in bold, and also any Denemo
directives like rehearsal marks, repeats, trills etc. These are editable
with the edits affecting the score (so there is a synchronization
between the LilyPond view and the Denemo display, quite hairy really,
though I have never managed to catch it out).
With the new score layout stuff only the stuff inside the music is
editable there, the non-music stuff is editable in the score layout
window.
So you are seeing nothing in bold because you have no repeats, tempo
marks, fingerings ... nothing added to the notes. It is one of the
unfinished jobs that you can't just start typing anywhere between the
notes and get a Denemo directive created at that point. You have to
create a Denemo directive and then you can re-write its text.